Electro-oxidation of Saturated Hydrocarbons on Platinized Platinum in Phosphoric Acid PDF Download
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Author: Glenn Stoner
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
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The anodic oxidation of normal hexane and cyclohexane in phosphoric acids gives two sets of measured parameters in two defined potential regions. Both sets are consistent with the same rate-determining step if one postulates a change from Langmuir to Temkin adsorption kinetics going from the lower (0.3 - 0.5 V) to the upper (0.57 - 0.8 V) potential region. The electrochemical activities of the hydrocarbons vary as follows: i sub C2H6 nearly equal to i sub C3H8 = 5 i sub n-hexane = 10 i sub cyclohexane. (Author).
Author: Glenn Stoner
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
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Book Description
The anodic oxidation of normal hexane and cyclohexane in phosphoric acids gives two sets of measured parameters in two defined potential regions. Both sets are consistent with the same rate-determining step if one postulates a change from Langmuir to Temkin adsorption kinetics going from the lower (0.3 - 0.5 V) to the upper (0.57 - 0.8 V) potential region. The electrochemical activities of the hydrocarbons vary as follows: i sub C2H6 nearly equal to i sub C3H8 = 5 i sub n-hexane = 10 i sub cyclohexane. (Author).
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 106
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The work was concerned with the practical implementation of the hot concentrated phosphoric acid, direct oxidation, hydrocarbon fuel cell. Experiments were concerned with three aspects of the over-all problem: the mechanism of the hydrocarbon to carbon dioxide reaction on a platinum anode, the role of surface morphology and surface defect structure in optimizing the characteristics of dispersed platinum-metal catalysts, and the development of suitable corrosion resistant structural materials for use in the acid electrolyte. The mechanism study was concerned with an investigation of the oxidative adsorption of propane on smooth platinum. Both the surface morphology study and the corrosion program were initiated.
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 1058
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Author: A. C. Makrides
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
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A study of the behavior under N2 and propane gases, of smooth Pt electrodes in concentrated phosphoric acid electrolytes was carried out. The adsorption of propane on Pt from concentrated H3PO4 at 80C. was studied with anodic and cathodic charging curves. Neither of these by itself was found to give a reliable estimate of the adsorbate concentration, but together they provided an insight into the character of the adsorbed species. Initial adsorption is probably on a single site but substantial further material is adsorbed on 3 sites, except at low potentials. The stoichiometry of this 3 site adsorbate corresponds to direct adsorption of propane. At longer times of adsorption, the propane degrades and is partially oxidized. This adsorbed product releases about two electrons per Pt surface site atom during its oxidation at high potentials. Coverage with this species is high at some potentials, and is potentialdependent. The rate of adsorption is probably controlled by the rate of diffusion of propane to the electrode. Current potential curves for the oxidation of C3H8 on smooth Pt, from 85% H3PO4, at 130C, were also studied. The oxidation rate, at low potentials, is activationcontrolled, with a Tafel slope of about 2.3 RT/F. At higher potentials, the oxidation rate is controlled by diffusion of propane.
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 892
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Author: A. J. Appleby
Publisher: Krieger Publishing Company
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 806
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Author: R. C. Alkire
Publisher:
ISBN:
Category : Electrochemistry
Languages : en
Pages : 794
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Author:
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 942
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 992
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